EP1580925B1 - Verfahren zum aufbau und abbau einer dienstverbindung zwischen einem drahtlosen lokalen netz und benutzerendgerät - Google Patents

Verfahren zum aufbau und abbau einer dienstverbindung zwischen einem drahtlosen lokalen netz und benutzerendgerät Download PDF

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EP1580925B1
EP1580925B1 EP20030769168 EP03769168A EP1580925B1 EP 1580925 B1 EP1580925 B1 EP 1580925B1 EP 20030769168 EP20030769168 EP 20030769168 EP 03769168 A EP03769168 A EP 03769168A EP 1580925 B1 EP1580925 B1 EP 1580925B1
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Prior art keywords
wlan
user terminal
control unit
service control
service
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French (fr)
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EP1580925A4 (de
EP1580925A1 (de
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Wenlin Huawei Administration Building ZHANG
Xiaoqin Huawei Administration Building DUAN
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority claimed from CN 02154432 external-priority patent/CN1231021C/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to user information processing, and more particularly, to a method for establishing or cancelling a service connection between a WLAN (Wireless Local Area Network) and a user terminal.
  • WLAN Wireless Local Area Network
  • WLAN that can provide a higher wireless access rate within a smaller area has seen in fast development.
  • IEEE 802.11 b that uses the frequency band of 2.4GHz
  • Bluetooth another alternative that uses the same frequency band is the Bluetooth. All other new technologies, such as IEEE 802.11a and ETSI BRAN Hiperlan2, use the frequency band of 5GHz.
  • WLANs are used to bear IP (Internet Protocol) data packets.
  • IP Internet Protocol
  • the WLAN access technology specific is usually transparent to the upper layer, e.g. IP layer or upper. All these IP networks are of the similar basic architecture which implements the wireless access of a user via the Access Point (AP) and builds an IP transmission network through the connection of the network control and connection devices.
  • AP Access Point
  • a WLAN user terminal can communicate with not only the Internet and Intranet but also the packet domain network of the 3GPP network via WLAN access networks. It is obvious that, as a wireless access technology that provides IP bearer, the WLAN can be interconnected with many other networks.
  • the authentication, authorization and accounting operation for the connection are controlled by an appropriate service control unit, for instance, the AAA (Authentication, Authorization and Accounting) server in a 3GPP system; and the subscriber information is managed by an subscriber information storage unit, for example, the HSS (Home Subscriber Server) or the HLR (Home Location Register) in the 3GPP system. Therefore, when the authentication, authorization and accounting processes is performed, the corresponding service control unit will request the user profile from the subscriber information storage unit, and store it temporarily in itself. The service control unit will not release the information stored until the service is terminated, wherein the so-called release refers to the step that the service control unit deletes the relevant data of the WLAN user who does not access the service any more.
  • the so-called release refers to the step that the service control unit deletes the relevant data of the WLAN user who does not access the service any more.
  • the user data can be deleted immediately after the WLAN user is offline, or be kept for a certain period of time before being deleted so that when the WLAN user logs in once again, the service control unit can use the stored data again without downloading it from the information storage unit. Once the subscriber information in the information storage unit is changed, the information storage unit will notify the corresponding service control unit to update the data.
  • the WLAN attach process there is no corresponding mechanism in the 3GPP standard supporting the attach process by which a WLAN user requests to access WLAN and establish a service connection, which is called the WLAN attach process.
  • a WLAN user cannot know whether he/she has successfully accessed the WLAN, and whether he is able to use the services provided by the WLAN.
  • the AAA server cannot determine whether the WLAN based services are available to the WLAN user.
  • the service control unit in order to prevent unnecessary signaling delivery, it is necessary to synchronize the user information stored in the service control unit and that in the subscriber information storage unit.
  • the information about the WLAN user connection can be updated only in the service control unit, such as the AAA server, without notification of the information storage unit for the WLAN user, such as the HLR/HSS.
  • the service control unit such as the AAA server
  • the information storage unit will not know the accurate status information of the WLAN user, which makes the user information stored in the information storage unit unreliable.
  • the information storage unit continues to ask for the user information, such as the service connection status of the WLAN user and the user data, from the service control unit in subsequent processing, which results in unnecessary signaling burden and meaningless system resource occupation.
  • the user information such as the service connection status of the WLAN user and the user data
  • ZHANG J ET AL addresses sound and effective AAA schemes for convenient and secure mobile wireless accesses in "Virtual operator based AAA in wireless LAN hot spots with ad-hoc networking support" MOBILE COMMUTING AND COMMUNICATIONS REVIEW, ACM, NEW YORK, NY, US, vol. 6, no.3, July 2002, pages 10-21 .
  • Another object of the present invention is to provide such a method for establishing a service connection between the WLAN and the WLAN user terminal that can synchronize the user information stored in the user information storage unit and the user information in the service control unit so as to avoid redundant message delivery and further improve the efficiency of the system.
  • a method for establishing or cancelling a user connection between a WLAN and a WLAN user terminal is applicable to a WLAN interworking network including the WLAN user terminal, a WLAN access unit, a service control unit and a user information storage unit, the method comprising:
  • a flag representing either an attached status or a detached status for the service connection between the WLAN user terminal and the WLAN can be also set in the WLAN user terminal.
  • the service control unit may be a 3GPP AAA Server and the user information storage unit can be a HSS or a HLR.
  • the step of establishing the connection between the WLAN user terminal and the network refers to attaching the WLAN user terminal to the WLAN, which further includes:
  • the attach request message in Step a11 contains a permanent or temporary identification of the WLAN user terminal.
  • the service control unit On receiving the attach request, the service control unit first determines whether the permanent or temporary identification of the WLAN user in the attach request message is valid. If not, the service control unit initiates a request procedure to the WLAN user terminal to fetch a valid flag of the WLAN user terminal; otherwise, the service control unit determines whether having stored in itself the user information of the WLAN- user terminal that sent the current request. If there is no such information, the service control unit sends a request for the data information of the WLAN user terminal to the corresponding user information storage unit; otherwise, goes to Step a12 directly.
  • the determination on whether to allow the current WLAN user terminal to establish the service connection in Step a12 is implemented by the existing authentication procedure.
  • the method further includes: on receiving the access response message sent by the service control unit, the WLAN user terminal modifying the relevant service connection flag in itself, indicating that the service connection between the WLAN user terminal and the WLAN has been successfully established.
  • the step of cancelling the service connection between the WLAN user terminal and the network refers to detaching the WLAN user terminal from the WLAN, the process of which further includes: the WLAN user terminal detaching from the WLAN, cancelling the relevant service connection, and the service control unit recording the service connection of the WLAN user terminal as WLAN detached.
  • the detach procedure can be an Explicit WLAN detach or an Implicit WLAN detach.
  • the method further comprises:
  • the detach process further comprises: the service control unit returning a response message to the WLAN user terminal, indicating that the WLAN user terminal has successfully been detached from the WLAN.
  • the method further comprises:
  • the service control unit sending to the WLAN user terminal a detach request that contains the reasons that the WLAN user terminal is detached from the WLAN; meanwhile, the service control unit recording the service connection status of the current WLAN user terminal as WLAN detached.
  • the method further comprises: if there is no response from the WLAN user terminal after the WLAN initiates at least one contact operation with the WLAN user terminal, the service control unit directly recording the service connection status of the WLAN user terminal as WLAN detached.
  • the process of Implicit WLAN detach further comprises: when the time during which there is no contact between the relevant WLAN user terminal and the WLAN exceeds a predetermined threshold, the WLAN initiating at least one contact process to contact with the WLAN user terminal.
  • the flags set in the WLAN user terminal and the service control unit can be new-defined specific flags or are implemented by re-using existing flags.
  • the messages bearing the connection establishing or cancelling procedures are implemented by new-defined specific messages or by re-using the messages in existing procedures
  • the attach or detach procedure mentioned above further includes: setting a flag that indicates the service connection status between the WLAN user terminal and the WLAN in the user information storage unit; the service control unit sending a user-data updating instruction to the user information storage unit, after recording the service connection status of the current WLAN user terminal; the user information storage unit updating the service connection status of the current WLAN user terminal after receiving the instruction, and then returning a user data updating response to the service control unit after updating the user's service connection information.
  • the method further comprises:
  • the method further comprises:
  • the method may as well further comprises:
  • deleting the user data in Step c31 comprises deleting the information of the WLAN user terminal from the service control unit immediately after the WLAN user terminal disconnects from the WLAN; or keeping, after the WLAN user terminal disconnects from the WLAN, the information of the WLAN user terminal in the service control unit for a certain period of time before deleting the information.
  • a WLAN interworking network for establishing or cancelling a service connection between a WLAN and a WLAN user terminal, comprising: the WLAN user terminal, a WLAN access unit, a service control unit and a user information storage unit, wherein, the service control unit has a flag representing either an WLAN attached status or a detached status for the service connection between the WLAN user terminal and the WLAN; and the flag is modified correspondingly when establishing or cancelling the service connection between the WLAN user terminal and the WLAN.
  • Still another embodiment of the present invention provides a service control unit in a WLAN interworking network, which includes a flag representing either an WLAN attached status or a detached status for the service connection between a WLAN user terminal and a WLAN; wherein the flag is modified correspondingly when establishing or cancelling the service connection between the WLAN user terminal (201) and the WLAN.
  • the method provided by this invention for processing the service connection of a WLAN user in a WLAN clearly defines a WLAN attach procedure by which the WLAN user terminal accesses the WLAN and a WLAN detach procedure by which the WLAN user terminal detaches from the WLAN so as to enable the service connection status (attach or detach) of the WLAN user terminal to be controlled interworkingly and effectively at the PLAN user terminal and the service control unit.
  • the method makes it possible to clearly indicate whether the current WLAN user terminal has successfully connected to the network and been able to enjoy the WLAN based services; or whether the current WLAN user terminal has smoothly been detached from the WLAN and terminated the WLAN based services.
  • the user information storage unit or the service control unit will send relevant messages each other in time so as to update simultaneously the user data in both the user information storage unit and the service control unit.
  • Using the method of the present invention can avoid redundant signaling burden and unnecessary occupation of the system resource caused by the lost of synchronization of the user data, improve the working efficiency of the system and the effectiveness of message transmission, and further provide more convenient and diversified services for the WLAN user.
  • the present invention provides an interworking method for various parts relating to the information of user service connection, such as the service control unit and the user information storage unit to process changes of the statuses of the WLAN user service connection when the connection is changed.
  • the present invention by means of tracing the change in the service connection between the WLAN user and the service control unit which takes place when the WLAN user accesses to or disconnects from the WLAN, provides a method to enable both the WLAN user terminal and the WLAN to know whether the WLAN user has successfully accessed the WLAN and the WLAN service is available or whether the WLAN user terminal has successfully been disconnected from the WLAN and the WLAN service needs to be terminated.
  • the structure of the WLAN system implementing the above interworking method proposed by the present invention is shown in Fig.2, comprising: a WLAN user terminal 201, a WLAN access unit 202, a service control unit 203 and a user information storage unit 204.
  • the WLAN access unit 202 is responsible for the accessing and routing management of the WLAN user terminal, enabling the WLAN user terminals therein to communicate with each other using IP protocol and to connect and communicate with other IP networks.
  • the WLAN access unit mainly comprises Access Points (AP) and Access Controllers (AC), and may also comprises routers for providing the network connectivity and relevant servers for network control.
  • AP Access Points
  • AC Access Controller
  • the service control unit 203 which functions as a user control center in the WLAN system, controls the WLAN users' access to the WLAN by means of authentication, and accounts for every WLAN user in the network.
  • This service control unit can be a subscription information application unit.
  • the AAA server is one example of the service control unit.
  • the user information storage unit 204 is used for storing the information of all WLAN users and can be implemented by the HSS/HLR.
  • Fig.3 The implementation process of the method in the present invention is shown in Fig.3, which comprises the steps of
  • the causes for cancelling the service connection between the WLAN user terminal and the network without notifying the network may also include an exceptional power off of the WLAN user terminal, a direct plug-off of the WLAN card from the computer, or a crashing down of the system, etc.
  • the network will also set the flag of the service connection between the WLAN user and the WLAN as WLAN detached after detecting that it is unable to connect with the WLAN user terminal.
  • the AAA server Take the AAA server as an example of the service control unit.
  • the AAA server determines whether there is the user's information in itself. If there is no such information, the AAA server downloads the relevant user data from the user information storage unit (e.g. HSS/HLR) and stores it. After the WLAN user has been successfully authenticated, the AAA server records the service connection status between the current WLAN user and the WLAN as WLAN attached, and at the same time sends a corresponding instruction to the WLAN user, indicating that the WLAN- user has already attached to the WLAN. The WLAN user terminal then indicates that the WLAN based services are available through the proper change of the service connection or the corresponding flag.
  • the user information storage unit e.g. HSS/HLR
  • the WLAN attach procedure of the WLAN user terminal is shown in Fig.4.
  • the HSS/HLR acts as a user information storage unit.
  • the procedure comprises the following steps:
  • the WLAN detach procedure of a WLAN user terminal falls into two groups depending on the detaching mode: Explicit WLAN detach and Implicit WLAN detach.
  • the Explicit WLAN detach can be further divided into two subgroups based on the initiator: the Explicit WLAN detach initiated by the WLAN user terminal, and that initiated by the WLAN.
  • the WLAN user terminal needs to identify the reason for the detachment in the detach request message sent to the WLAN; similarly, in an Explicit WLAN detach procedure initiated by the WLAN, it is also necessary for the network to identify the reason for the detachment in the detach request message sent to the WLAN user.
  • the Implicit WALN detach procedure is initiated by the network performed when the WLAN user has not contacted with the WLAN for a long time. In this case, the network does not need to inform the WLAN user terminal after the detach procedure is completed.
  • the service control unit will perform the detach procedures in two ways: 1 records the service connection status ofWLAN user as WLAN detached, sends a user detach notification to the user information storage unit, and then the user information storage unit sets a corresponding flag for the current service connection status of the WLAN user; 2 directly deletes the user information without setting a flag for the service connection of the WLAN- user, sends a notification to the user information storage unit indicating that the user information has been deleted, and then the user information storage unit records that the user information has been deleted in the service control unit.
  • Fig.8 The interworking process between the service control unit and the user information storage unit based on the method 1 is shown in Fig.8, comprising the following steps:
  • Fig.9 The interworking process between the service control unit and the user information storage unit based on the method 2 is shown in Fig.9, comprising the following steps:
  • the user information storage unit prefferably preset a flag representing the service connection status between the WLAN user terminal and the WLAN.
  • the messages to support the above various interworking procedures can be implemented by new-defined messages, for example, defined by Mobile Application Part (MAP) protocol, Remote Authentication Dial in User Service (RADIUS) protocol, or DIAMETER protocol.
  • MAP Mobile Application Part
  • RADIUS Remote Authentication Dial in User Service
  • DIAMETER DIAMETER protocol
  • the interworking procedure can also be implemented by adding parameters to the existing messages.
  • the user information mentioned in the above solutions could be the Subscription Information.

Claims (24)

  1. Verfahren zum Aufbau oder Abbau einer Dienstverbindung zwischen einem WLAN und einem WLAN-Teilnehmerendgerät (201), anwendbar auf ein WLAN-Übergangsnetzwerk mit dem WLAN-Teilnehmerendgerät (201), einer WLAN-Zugangseinheit (202), einer Dienststeuerungseinheit (203) und einer Teilnehmerinformationsspeichereinheit (204), dadurch gekennzeichnet, daß es die folgenden Schritte umfaßt:
    Setzen eines Flags, das entweder einen an WLAN angeschalteten Status oder einen abgeschalteten Status für die Dienstverbindung zwischen dem WLAN-Teilnehmerendgerät (201) und dem WLAN darstellt, in der Dienststeuerungseinheit (203); und
    Aufbauen oder Abbauen der Dienstverbindung zwischen dem WLAN-Teilnehmerendgerät (201) und dem WLAN, und entsprechendes Modifizieren des Flags.
  2. Verfahren nach Anspruch 1, wobei, während des Aufbaus der Dienstverbindung zwischen dem WLAN-Teilnehmerendgerät (201) und dem Netzwerk das WLAN-Teilnehmerendgerät (201) sich an WLAN anschaltet, was die folgenden Schritte umfaßt:
    a11: wenn das WLAN-Teilnehmerendgerät (201) auf das WLAN zugreift, durch das WLAN-Teilnehmerendgerät (201) erfolgendes Senden einer Anschaltanforderungsnachricht an die Dienststeuerungseinheit (203) über die WLAN-Zugangseinheit (202, 401);
    a12: bei Empfang der Anschaltanforderung, durch die Dienststeuerungseinheit (203) erfolgendes Bestimmen, ob dem aktuellen WLAN-Teilnehmerendgerät (201) gestattet werden soll, eine Dienstverbindung aufzubauen; wenn nicht, durch die Dienststeuerungseinheit (203) erfolgendes Ablehnen der durch das WLAN-Teilnehmerendgerät (201) gesendeten Anschaltanforderung und Beenden dieser Prozedur; andernfalls durch die Dienststeuerungseinheit (203) erfolgendes Aufzeichnen des Dienstverbindungsstatus des WLAN-Teilnehmerendgeräts (201) als an WLAN angeschaltet (406) und Zurücksenden einer Zugriffsantwortnachricht an das WLAN-Teilnehmerendgerät (201, 409).
  3. Verfahren nach Anspruch 2, wobei die Anschaltanforderungsnachricht in Schritt all eine dauerhafte oder temporäre Kennung des aktuellen WLAN-Teilnehmerendgeräts (201) enthält; bei Empfang der Anschaltanforderung die Dienststeuerungseinheit (203) zuerst bestimmt, ob die dauerhafte oder temporäre Kennung des WLAN-Teilnehmers in der Anschaltanforderungsnachricht gültig ist; wenn nicht, die Dienststeuerungseinheit (203) eine Anforderungsprozedur an das WLAN-Teilnehmerendgerät (201) auslöst, um ein gültiges Flag des WLAN-Teilnehmerendgeräts (201) abzurufen; andernfalls die Dienststeuerungseinheit (203) bestimmt, ob sie die Teilnehmerinformation des WLAN-Teilnehmerendgeräts (201), das die aktuelle Anforderung sendet, gespeichert hat; wenn keine solche Information vorliegt, die Dienststeuerungseinheit (203) eine Anforderung der Dateninformation des WLAN-Teilnehmerendgeräts (201) an die entsprechende Teilnehmerinformationsspeichereinheit (204, 403, 404) sendet; andernfalls sie direkt zu Schritt a12 geht.
  4. Verfahren nach Anspruch 2, wobei die Bestimmung in Schritt a12, ob dem aktuellen WLAN-Teilnehmerendgerät (201) gestattet werden soll, die Dienstverbindung aufzubauen, durch die Authentifizierungsprozedur (405) implementiert wird.
  5. Verfahren nach Anspruch 2, ferner die folgenden Schritte umfassend: bei Empfang der durch die Dienststeuerungseinheit (203) gesendeten Zugriffsantwortnachricht durch das WLAN-Teilnehmerendgerät (201) erfolgendes Modifizieren des in ihm gespeicherten Dienstverbindungsflags, was anzeigt, daß die Dienstverbindung zwischen dem WLAN-Teilnehmerendgerät (201) und dem WLAN erfolgreich aufgebaut worden ist.
  6. Verfahren nach Anspruch 1, wobei während des Abbaus der Dienstverbindung zwischen dem WLAN-Teilnehmerendgerät (201) und dem Netzwerk das WLAN-Teilnehmerendgerät (201) sich vom WLAN abschaltet, was die folgenden Schritte umfaßt: durch das WLAN-Teilnehmerendgerät (201) erfolgendes Abschalten vom Netzwerk, Abbauen der betreffenden Dienstverbindung, und durch die Dienststeuerungseinheit (203) erfolgendes Aufzeichnen der Dienstverbindung des WLAN-Teilnehmerendgeräts (201) als von WLAN abgeschaltet (502, 602, 702); wobei die Abschaltprozedur eine explizite WLAN-Abschaltung oder eine implizite WLAN-Abschaltung sein kann.
  7. Verfahren nach Anspruch 6, wobei, wenn die explizite WLAN-Abschaltung durch das WLAN-Teilnehmerendgerät (201) ausgelöst wird, das Verfahren ferner die folgenden Schritte umfaßt:
    a21: durch das WLAN-Teilnehmerendgerät (201) erfolgendes Senden einer Abschaltanforderung an das WLAN, die den Grund enthält, aus dem sich das WLAN-Teilnehmerendgerät (201) vom WLAN abschaltet (501);
    a22: bei Empfang der Abschaltmeldung, durch die Dienststeuerungseinheit (203) erfolgendes Aufzeichnen des Dienstverbindungsstatus des WLAN-Teilnehmerendgeräts (201) als von WLAN abgeschaltet (502).
  8. Verfahren nach Anspruch 7, ferner die folgenden Schritte umfassend: durch die Dienststeuerungseinheit (203) erfolgendes Zurücksenden einer Antwortnachricht an das aktuelle WLAN-Teilnehmerendgerät (201), die besagt, daß das WLAN-Teilnehmerendgerät (201) vom WLAN abgeschaltet worden ist (503).
  9. Verfahren nach Anspruch 6, wobei, wenn die explizite WLAN-Abschaltung durch das WLAN ausgelöst wird, das Verfahren ferner die folgenden Schritte umfaßt:
    durch die Dienststeuerungseinheit (203) erfolgendes Senden einer Abschaltanforderung, welche die Gründe enthält, warum das WLAN-Teilnehmerendgerät (201) vom WLAN abgeschaltet wird (601); mittlerweile durch die Dienststeuerungseinheit (203) erfolgendes Aufzeichnen des Dienstverbindungsstatus des aktuellen WLAN-Teilnehmerendgeräts (201) als von WLAN abgeschaltet (602).
  10. Verfahren nach Anspruch 6, wobei, wenn die Abschaltprozedur eine implizite WLAN-Abschaltung ist, das Verfahren ferner die folgenden Schritte umfaßt:
    wenn keine Antwort vom WLAN-Teilnehmerendgerät (201) vorliegt, nachdem das WLAN mindestens einen Kontaktversuch zum WLAN-Teilnehmerendgerät (201, 701) ausgelöst hat, durch die Dienststeuerungseinheit (203) erfolgendes direktes Aufzeichnen des Dienstverbindungsstatus des WLAN-Teilnehmerendgeräts (201) als von WLAN abgeschaltet (702).
  11. Verfahren nach Anspruch 10, ferner die folgenden Schritte umfassend: wenn die Zeit, während der kein Kontakt zwischen dem betreffenden WLAN-Teilnehmerendgerät (201) und dem WLAN erfolgt, eine vorbestimmte Dauer überschreitet, durch das WLAN erfolgendes Auslösen mindestens einer Kontaktoperation, um mit dem WLAN-Teilnehmerendgerät (201) in Kontakt zu treten.
  12. Verfahren nach Anspruch 1, wobei die zu unterstützenden Nachrichten in den Dienstverbindungsaufbau- oder -abbauprozeduren zwischen dem WLAN-Teilnehmerendgerät (201) und dem WLAN durch unabhängig definierte spezielle Nachrichten oder durch Verwendung der Nachrichten in den bestehenden Prozeduren implementiert werden.
  13. Verfahren nach Anspruch 2 oder 6, ferner die folgenden Schritte umfassend: in der Teilnehmerinformationsspeichereinheit (204) erfolgendes Setzen eines Flags, das den Dienstverbindungsstatus zwischen dem WLAN-Teilnehmerendgerät (201) und dem WLAN anzeigt; durch die Dienststeuerungseinheit (203) erfolgendes Aufzeichnen des Dienstverbindungsstatus des aktuellen WLAN-Teilnehmerendgeräts (201) und dann Senden einer Teilnehmerdaten-Aktualisierungsanweisung an die Teilnehmerinformationsspeichereinheit (204); durch die Teilnehmerinformationsspeichereinheit (204) erfolgendes Aktualisieren des Dienstverbindungsstatus des aktuellen WLAN-Teilnehmerendgeräts (201) bei Empfang der Anweisung, dann Zurücksenden einer Teilnehmerdaten-Aktualisierungsantwort an die Dienststeuerungseinheit (203).
  14. Verfahren nach Anspruch 13, wobei, wenn der Dienstverbindungsstatus des Teilnehmers in den an WLAN angeschalteten Status geändert wird, das Verfahren ferner die folgenden Schritte umfaßt:
    c11: durch die Dienststeuerungseinheit (203) erfolgendes Setzen des Dienstverbindungsstatus des aktuellen WLAN-Teilnehmerendgeräts (201) als an WLAN angeschaltet und gleichzeitiges Senden einer Anschaltbenachrichtigung an die Teilnehmerinformationsspeichereinheit (204);
    c12: bei Empfang der Anschaltbenachrichtigung, durch die Teilnehmerinformationsspeichereinheit (204) erfolgendes Setzen des Dienstverbindungsstatus des betreffenden WLAN-Teilnehmerendgeräts (201) als an WLAN angeschaltet, dann Zurücksenden einer Antwortnachricht an die Dienststeuerungseinheit (203).
  15. Verfahren nach Anspruch 13, wobei, wenn der Dienstverbindungsstatus des WLAN-Teilnehmers in den von WLAN abgeschalteten Status geändert wird, das Verfahren ferner die folgenden Schritte umfaßt:
    c21: durch die Dienststeuerungseinheit (203) erfolgendes Setzen des Dienstverbindungsstatus des aktuellen WLAN-Teilnehmerendgeräts (201) als von WLAN abgeschaltet (801) und gleichzeitiges Senden einer Abschaltbenachrichtigung an die Teilnehmerinformationsspeichereinheit (204, 802);
    c22: bei Empfang der Abschaltbenachrichtigung, durch die Teilnehmerinformationsspeichereinheit (204) erfolgendes Setzen des Dienstverbindungsstatus des betreffenden WLAN-Teilnehmerendgeräts (201) als von WLAN abgeschaltet (803), dann Zurücksenden einer Antwortnachricht an die Dienststeuerungseinheit (203, 804).
  16. Verfahren nach Anspruch 13, wobei, wenn die Teilnehmerinformation in von WLAN abgeschaltet geändert wird, das Verfahren ferner die folgenden Schritte umfaßt:
    c31: durch die Dienststeuerungseinheit (203) erfolgendes Löschen (901) der darin gespeicherten Teilnehmerdaten des aktuellen WLAN-Teilnehmerendgeräts (201) und gleichzeitiges Senden einer Teilnehmerinformationslöschungsbenachrichtigung an die Teilnehmerinformationsspeichereinheit (204, 802);
    c32: bei Empfang der Löschungsbenachrichtigung, durch die Teilnehmerinformationsspeichereinheit (204) erfolgendes Aufzeichnen, daß die Teilnehmerdaten des betreffenden WLAN-Teilnehmerendgeräts (201) aus der Dienststeuerungseinheit (203, 903) gelöscht worden sind, dann Zurücksenden einer Antwortnachricht an die Dienststeuerungseinheit (203, 904).
  17. Verfahren nach Anspruch 16, wobei das Löschen der Teilnehmerdaten in Schritt c31 den folgenden Schritt umfaßt: Löschen der Information des WLAN-Teilnehmerendgeräts (201) aus der Dienststeuerungseinheit (203), unmittelbar nachdem das WLAN-Teilnehmerendgerät (201) vom WLAN getrennt worden ist.
  18. Verfahren nach Anspruch 16, wobei das Löschen der Teilnehmerdaten in Schritt c31 den folgenden Schritt umfaßt: nachdem das WLAN-Teilnehmerendgerät (201) vom WLAN getrennt worden ist, Aufbewahren der Information des WLAN-Teilnehmerendgeräts (201) in der Dienststeuerungseinheit (203) für einen gewissen Zeitraum, bevor die Information gelöscht wird.
  19. Verfahren nach Anspruch 1, wobei die Dienststeuerungseinheit (203) ein Authentifizierungs-, Autorisierungs- und Abrechnungs-(AAA-)Server ist.
  20. Verfahren nach Anspruch 1, wobei die Teilnehmerinformationsspeichereinheit (204) ein Heimat-Teilnehmerserver (HSS) oder eine Heimatdatei (HLR) ist.
  21. Verfahren nach Anspruch 1, wobei ein Flag, das entweder einen angeschalteten Status oder einen abgeschalteten Status für die Dienstverbindung zwischen dem WLAN-Teilnehmerendgerät (201) und dem WLAN darstellt, im WLAN-Teilnehmerendgerät (201) gesetzt wird.
  22. Verfahren nach Anspruch 1 oder 21, wobei das Flag neu definierte spezifische Flags umfaßt oder durch Wiederverwendung bestehender Flags implementiert wird.
  23. WLAN-Übergangsnetzwerk zum Aufbau oder Abbau einer Dienstverbindung zwischen einem WLAN und einem WLAN-Teilnehmerendgerät (201), umfassend: das WLAN-Teilnehmerendgerät (201), eine WLAN-Zugangseinheit (202), eine Dienststeuerungseinheit (203) und eine Teilnehmerinformationsspeichereinheit (204), dadurch gekennzeichnet, daß:
    die Dienststeuerungseinheit (203) ein Flag hat, das entweder einen an WLAN angeschalteten Status oder einen abgeschalteten Status für die Dienstverbindung zwischen dem WLAN-Teilnehmerendgerät (201) und dem WLAN darstellt; und
    das Flag entsprechend modifiziert wird, wenn die Dienstverbindung zwischen dem WLAN-Teilnehmerendgerät (201) und dem WLAN aufgebaut oder abgebaut wird.
  24. Teilnehmerinformationsspeichereinheit (203) in einem WLAN-Übergangsnetzwerk, dadurch gekennzeichnet, daß sie folgendes aufweist: ein Flag, das entweder einen an WLAN angeschalteten Status oder einen abgeschalteten Status für die Dienstverbindung zwischen einem WLAN-Teilnehmerendgerät (201) und einem WLAN darstellt;
    wobei das Flag entsprechend modifiziert wird, wenn die Dienstverbindung zwischen dem WLAN-Teilnehmerendgerät (201) und dem WLAN aufgebaut oder abgebaut wird.
EP20030769168 2002-12-12 2003-10-30 Verfahren zum aufbau und abbau einer dienstverbindung zwischen einem drahtlosen lokalen netz und benutzerendgerät Expired - Lifetime EP1580925B1 (de)

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CN 02154432 CN1231021C (zh) 2002-11-12 2002-12-12 无线局域网中对用户终端服务连接关系的处理方法
PCT/CN2003/000921 WO2004054169A1 (fr) 2002-12-12 2003-10-30 Procede de traitement relatif a la connexion de service entre un reseau local sans fil et un terminal utilisateur

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US8917710B2 (en) 2014-12-23
US20050286461A1 (en) 2005-12-29
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US7298726B2 (en) 2007-11-20
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